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Chrome extension: validate relay endpoint response format

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Options page now validates that /json/version returns valid CDP JSON (with Browser/Protocol-Version fields) rather than accepting any HTTP 200 response. This prevents false success when users mistakenly configure the gateway port instead of the relay port (gateway + 3).

Helpful error messages now guide users to use "gateway port + 3" when they configure the wrong port.
This commit is contained in:
Kriz Poon
2026-02-20 15:31:17 +00:00
committed by Peter Steinberger
parent 1fdaaaedd3
commit 0a53a77dd6
2 changed files with 44 additions and 6 deletions
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13
assets/chrome-extension/background.js
View File

@@ -882,7 +882,18 @@ chrome.runtime.onMessage.addListener((msg, _sender, sendResponse) => {
const { url, token } = msg
const headers = token ? { 'x-openclaw-relay-token': token } : {}
fetch(url, { method: 'GET', headers, signal: AbortSignal.timeout(2000) })
.then((res) => sendResponse({ status: res.status, ok: res.ok }))
.then(async (res) => {
const contentType = String(res.headers.get('content-type') || '')
let json = null
if (contentType.includes('application/json')) {
try {
json = await res.json()
} catch {
json = null
}
}
sendResponse({ status: res.status, ok: res.ok, contentType, json })
})
.catch((err) => sendResponse({ status: 0, ok: false, error: String(err) }))
return true
})

37
assets/chrome-extension/options.js
View File

@@ -54,12 +54,39 @@ async function checkRelayReachable(port, token) {
}
if (res.error) throw new Error(res.error)
if (!res.ok) throw new Error(`HTTP ${res.status}`)
// Validate that this is a CDP relay /json/version payload, not gateway HTML.
const contentType = String(res.contentType || '')
const data = res.json
if (!contentType.includes('application/json')) {
setStatus(
'error',
'Wrong port: this is likely the gateway, not the relay. Use gateway port + 3 (for gateway 18789, relay is 18792).',
)
return
}
if (!data || typeof data !== 'object' || !('Browser' in data) || !('Protocol-Version' in data)) {
setStatus(
'error',
'Wrong port: expected relay /json/version response. Use gateway port + 3 (for gateway 18789, relay is 18792).',
)
return
}
setStatus('ok', `Relay reachable and authenticated at http://127.0.0.1:${port}/`)
} catch {
setStatus(
'error',
`Relay not reachable/authenticated at http://127.0.0.1:${port}/. Start OpenClaw browser relay and verify token.`,
)
} catch (err) {
const message = String(err || '').toLowerCase()
if (message.includes('json') || message.includes('syntax')) {
setStatus(
'error',
'Wrong port: this is not a relay endpoint. Use gateway port + 3 (for gateway 18789, relay is 18792).',
)
} else {
setStatus(
'error',
`Relay not reachable/authenticated at http://127.0.0.1:${port}/. Start OpenClaw browser relay and verify token.`,
)
}
}
}